The impact of massive neutrinos on halo assembly bias

Using the publicly available Quijote simulations, we present first measurements of assembly bias dark matter halos in N-body simulations which include massive neutrinos. We focus on dependence linear b_1 three halo properties: 1) concentration c, 2) spin λ, and 3) ellipticity s. Although these cover a large volume, superior to any future surveys, do not detect effect neutrinos relations b1(c), b1(λ) b1(s) at fixed mass. further study properties environment neutrinos, finding quantities be impacted by neutrino masses same level as bias. find that shape can largely attributed change cold σ8 is case for concentration.